Valve-seat grinder.



' E E. TGWNSEND.

VALVE SEAT GRINDEB.

APPLIGAToN ULEB. APR. 17, 1909.

Eaented May 3L 21910.

,'.Hnnaw u GEMM@ cn Puowmuocmwsm wnsnmewn o c ELVN E. TOWNSEND, OFOAKLAND, CALIFORNIA.

VALVE-SEAT GRINDER.

Specification of Letters Patent.

Patented May 31, 1910.

Application filed April 17, 1909. Serial No. 490,463.

To all whom it muy concern.'

Be it known that l, ELvrN E. TowNsnND, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented certain new and useful Improvements in Valve- SeatGrinders, of which the following is a specication, reference being hadtherein to the accompanying drawing.

This invention relates to valve seat grinders, and has particularly inview a manually operable tool adapted to oscillate and rotate. a valvewhile in contact with its seat, and thereby assure of the same beingacted upon so as to be thoroughly ground.

ln carrying out the objects of the invention generally stated above itis contemplated employing a manually operable tool which may beoscillated at a high speed while connected with a valve to impart itsmovements to the latter, said tool being provided with means whereby apartial rotation of the same may be had by releasing the manuallyapplied pressure upon it so that the oscillating movements may be usedto grind the faces of a valve and seat.

It will be understood, of course, that the essential features of theinvention involved in producing the invention which is capable ofperforming the above generally stated functions are necessarilysusceptible to a wide range of details and structural arrangements, butone preferred and practical embodiment thereof is shown in theaccompanying drawings, wherein- Figure 1 is a side elevation of theimproved seat grinder, a portion thereof being shown in section. Fig. 2is a detail vertical sectional view of a portion of the tool, show ingthe clutch connection between the tool and an insertible bit or thelike. Fig. 8 is a horizontal sectional view taken on the line 3 3,Fig. 1. Figs. 4; and 5 are respectively, a plan and a side view of thehead of the insertiblc bit. Eig. G is a sectional view taken on the line6 6, looking up. Fig. 7 is a similar view, looking downward.

Referring to said drawings by numerals, 1 designates a frame which atits upper portion is provided with a handle 2, and an oppositelydisposed horizontally arranged shaft 3 upon which a gear wheel 4 ismounted. Said shaft 3 is provided with a crank handle 5 by means ofwhich the same is rotated to impart a corresponding movement to the gearwheel Ll. The base of said frame is provided with a loop-shaped casing 6through which a vertically disposed shaft 7 projects, said shaft 7having one of its ends journaled in said casing and its other endjournaled in the upper portion of the frame 1. A pinion 8 is keyed orotherwise rigidly secured to said shaft 7 and is at all times in meshwith the gear wheel a. The portion of said shaft 7 within the casing (3has a triangular shaped vibrator 9 fast thereon, the points of which areadapted to contact with the end rollers 10 carried by the yoke arms 11which are disposed on opposite sides of said vibrator, said arms beingrigidly connected with a stub shaft 12 mounted in said casing 6 andhaving one end projecting into a tubular barrel 13 carried by saidcasing and being keyed or otherwise rigidly secured to one end of thesame. The free end of said barrel 13 is provided with beveled orsubstantially V-shaped teeth 1li and the intermediate portion of thesame is provided with parallel and curved guiding slots 1G. A. clutchmember 17 is slidably mounted in said barrel and is provided withoutwardly projecting pins 18 which project through said slots 16. Aspring 19 is coiled about said barrel and has one end con nected to oneof the pins 18 and its other end connected with a pin 20 carried by theupper end portion of said barrel, the tension of said spring beingexerted to force said clutch member toward the free end of said barrel.Said clutch member 17 has its outer end provided with beveled andshouldered teeth 21 adapted for an interlocking engagement with similarteeth carried by the head 23 of a bit, screw driver, or the like 24which is inserted into said barrel. Said bit is provided with oppositelydisposed laterally projecting lugs 25 which are acted upon by the endteeth of the barrel 13 to oscillate said bit, as will be presentlyexplained. Said bit adjacent to its head is reduced as indicated at Q6to permit a pin or key 27 to be passed through said barrel to retain thebit therein.

The operation of the device is as follows, assuming the tool to be inthe position shown in Fig. 1 The outer or free end of the bit isinserted in the usual slot in the end of a valve stem, and the handle 5is operated to rotate its gear wheel 4f and also gear or pinion 8, shaft7 and vibrator 9, thereby oscilw lating or vibrating the yoke arms 11which movement is communicated to shaft 12 and barrel 13. The clutchmember 17 being held to the lower ends of the slots of the barrel 13 bythe tension of the spring, said member will rota-te with the barrel andas it-s head is in engagement with the toothed head of the bit, the samemovement will be imparted to the bit, and through the latter to thevalve. During this oscillatory movement of the valve, it is of courseadvisable to rotate the same occasionally in order to grind evenly, andsuch rotation may be imparted by releasing the pressure upon the handle2 which forces the bit down the barrel 13 and at the same time the slots16 impart a rotary movement to the clutch member 17, thereby rotatingthe said bit. Thus it will be seen that when pressure is removed fromthe handle 1, the spring 19 will force the clutch member 17 against thetoothed head of the bit and cause said bit to describe a quarter turn asit issues from the barrel 13. To prevent the bit from falling ordropping from the barrel, the pin or key 27 is employed which engagesunder the head of the bit, as will be readily understood.

From the foregoing it will be seen that the improved tool may be readilyoperated by one person, and throughthe described gearing and clutchconnections, it is possible to both oscillate and rotate the valve so asto assure of the seat being thoroughly treated or ground at all points.

Vhat 'I claim as my invention is 1. A device of vthe character describedcomprising a frame, a barrel carried by said frame, a bit insertible insaid barrel and adapted for attachment With a valve, a. vibrator carriedby said frame for oscillating said barrel and said bit, and meanscarried by said barrel for imparting a partial rotation to said bitwhile being vibrated.

2. A device of the character described comprising a frame, a vibratorrotatably mounted therein, a barrel carried by said frame, yoke armscarried by said barrel and held in the path of movement of saidvibrator, said barrel being provided with guiding slots, a clutch membermounted in said barrel and having pins projecting through the slotstherein, a spring coiled about said barrel and bearing upon one of saidpins, and a bit insertible in said barrel and provided with a clutchhead which is engaged by said clutch member.

3. A device of the character described comprising a frame, a vibratormounted therein, means for rotating said vibrator, a barrel carried bysaid frame, yoke arms carried by said barrel, and held in the path ofmovement of said vibrator, a clutch member in said barrel, a bitinsertible in said barrel and adapted for engagement by said clutchmember, and means carried by said barrel for imparting a partialrotation to said clutch member.

4. A device of the character described comprising a frame provided witha handle, a rotatable vibrator mounted in said frame, a barrel carriedby said frame and operated by said vibrator, said barrel being providedwith guiding slots, a bit adapted to be inserted'in said barrel andprovided with a toothed head, a clutch member slidable in said barreland provided with outstanding pins which project through the slots ofthe barrel, and a spring coiled about said barrel and having one endsecured thereto and its other end secured to one of the pins of theclutch member, whereby when a downward pressure is exerted upon saidhandle, a partial rotation may be imparted to the bit.

5. A device of the character described comprising a frame, a handletherefor, a gear wheel carried by said frame, a vertically disposedshaft mounted in said frame and provided with a pinion held in mesh withsaid gear wheel, a vibrator carried by said shaft, a barrel carried bysaid frame and operated by said vibrator, and a bit carried by saidbarrel.

6. A device of the character described comprising a frame having anoperating handle, a horizontally disposed shaft carried thereby, a gearonsaid shaft, a handle for operating said shaft, a vertically disposedshaft also carried by said frame, a pinion on said vertical shaft andheld in mesh with said gear wheel, a vibrator carried by the lastmentioned shaft, and a bitreceiving barrel carried by said frame andoperated by said vibrator.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

ELVIN E. TOWNSEND.

Witnesses:

F. P. SCHROEDER, H. C. ScHRoEDnR.

